CN1735005A - Use reference signal to carry out the apparatus and method of synchronous data transmission - Google Patents
Use reference signal to carry out the apparatus and method of synchronous data transmission Download PDFInfo
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- CN1735005A CN1735005A CNA2005100022482A CN200510002248A CN1735005A CN 1735005 A CN1735005 A CN 1735005A CN A2005100022482 A CNA2005100022482 A CN A2005100022482A CN 200510002248 A CN200510002248 A CN 200510002248A CN 1735005 A CN1735005 A CN 1735005A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q9/04—Arrangements for synchronous operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
- H04L7/0331—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop with a digital phase-locked loop [PLL] processing binary samples, e.g. add/subtract logic for correction of receiver clock
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4265—Bus transfer protocol, e.g. handshake; Synchronisation on a point to point bus
- G06F13/4273—Bus transfer protocol, e.g. handshake; Synchronisation on a point to point bus using a clocked protocol
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/14—Channel dividing arrangements, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
- H04L7/005—Correction by an elastic buffer
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
- H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
- H04N21/42222—Additional components integrated in the remote control device, e.g. timer, speaker, sensors for detecting position, direction or movement of the remote control, microphone or battery charging device
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- H—ELECTRICITY
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- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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Abstract
Use reference signal to carry out the apparatus and method of synchronous data transmission.A kind of data transmitter and data sink, it generates separately synchronizing signal according to the common reference signal.This data sink uses respectively in a plurality of one digit number number of it is believed that the single position by the parallel data that is received constitutes each that the phase place of first clock signal is adjusted, so that guaranteed settling time and retention time, and each one digit number number of it is believed that is written in the data buffer according to this clock signal through adjusting for each one digit number number of it is believed that.Then, this data sink according to the second clock signal and with this receiver synchronizing signal data of reading and saving in this data buffer synchronously.Initialization will be written into the memory location of data-signal when the training mode that detects with this transmitter synchronizing signal synchronized transmission.
Description
Technical field
The present invention relates to such as the transfer of data between the device with high-speed interface of semiconductor chip.
Background technology
In processor LSI (large scale integrated circuit) and the transfer of data between the chipset LSI in computer, when between semiconductor chip, carrying out transfer of data, must provide sufficient foundation (setup) and the retention time for data-signal.According to conventional method, for example disclosed in JP-A-8-102729, the clock signal of transmitter chip is sent to receiver chip, this receiver chip makes the clock signal delay that is received, to guarantee settling time and retention time.
Figure 1A represents to be used for sending according to traditional source method for synchronous the structure of multi-bit parallel data.Transmitter chip 11 have delay circuit 21, trigger (FF) circuit 22-i and output circuit 23 and 24-i (i=1,2 ..., N), and receiver chip 12 have input circuit 25 and 26-i and flip-flop circuit 27-i (i=1,2 ..., N).
The source method for synchronous is following method: when carrying out transfer of data between these chips, for the clock signal of using provides a fixing delay, and this clock signal is sent to receiver chip 12 with data-signal in transmitter chip 11 (or receiver chip 12).In receiver chip 12, use from the clock signal of transmitter chip 11 transmissions this data-signal is carried out gating, shown in Figure 1B.
By considering various delays (for example delay of the internal wiring of circuit board wiring, LSI and driver) and processing variation, the fixed delay that offers clock signal is determined in the foundation and the scope of holding time of the flip-flop circuit 27-i in guaranteeing receiver.On principle, the wiring of chip chamber is the wiring of equal length, with the phase difference between a plurality of passages that reduce transmission path.
The advantage of source method for synchronous is: owing to only need clock signal is adjusted, so can relatively easily set up the adjustment circuit.Yet a frequency period that requires to be compared by the scope that single clock signal carries out the phase change between a plurality of data-signals of gating the clock signal that is sent is narrow.Therefore, the source method for synchronous has following restriction:
(1) wiring between chip should be the wiring of equal length.
(2) carrying out the data bits N of gating by single clock signal should be less relatively.
(3) even satisfied condition (1) and (2), but owing to the phase change according to processing and Transmit Degrade, transfer of data also possibly can't be carried out.
Below each piece document relate to parallel/Serial Data Transfer Mode, clock signal is adjusted, time lag is adjusted (skew adjustment), clock signal generates, timing controlled etc.: JP-A-8-102729, JP-A-2000-285144, JP-A-8-044667, JP-A-10-164037, JP-A-2002-044061, JP-A-6-177940, JP-A-8-054955, JP-A-2002-108642, JP-A-2000-134189, JP-A-11-163846, JP-A-5-336091, JP-A-2000-341135, JP-A-2002-223208, JP-A-2003-273852, JP-A-5-225079 and JP-A-5-336210.
At transmitter chip concurrently in the said method of tranmitting data register signal and parallel data signal, between a plurality of data-signals that constitute by single position respectively, be limited within the frequency period of clock signal with respect to the scope of the phase change of same clock signal.Therefore, be difficult to realize high transmission rate.In addition, owing to need to reduce respectively the phase change between a plurality of data-signals that the data (following can being referred to as " the one digit number number of it is believed that ") by single position constitute, and restriction is increased, these restrictions comprise that the wiring that must use equal length comes these chips are carried out line each other, make the design of encapsulation wiring become difficult more.
In the function that does not comprise the tranmitting data register signal, but only provide in the other method of the function that the phase place of the local clock of generation among the PLL in the receiver chip (phase-locked loop) is adjusted, because long-time shake (jitter) in the PLL of receiver chip, and make and to satisfy the requirement of guaranteeing to set up with the retention time.
Fig. 1 C represents the not desirable clock signal of shake, and as the clock signal with long-time shake of extreme example.Fig. 1 D represents that clock frequency over time.For example, when the frequency of the clock signal of the PLL of transmitter chip becomes higher, and the frequency of the clock signal of receiver chip is when becoming low, even each local clock is adjusted, also possibly can't satisfy the requirement of guaranteeing to set up with the retention time.
Summary of the invention
Therefore, one object of the present invention is to be implemented in the high speed data transfer of multi-bit parallel data when transmitter sends to receiver, suppresses respectively the phase change between a plurality of one digit number number of it is believed that the data by single position constitute simultaneously.
Another object of the present invention is to, when with the multi-bit parallel data when transmitter sends to receiver, guarantee each settling time and the retention time in a plurality of one digit number number of it is believed that in the receiver.
According to a preferred aspect of the present invention, data transmitter has synchronous signal generating circuit, pattern generating circuit and output circuit, and the multi-bit parallel data are sent to data sink.Data sink according to the present invention has synchronous signal generating circuit, pattern detection circuit, clock adjustment circuit, data buffer circuit and reads circuit, and receives the parallel data that sends from data transmitter.
In data transmitter, synchronous signal generating circuit uses reference signal to produce the transmitter synchronizing signal, pattern generating circuit and transmitter synchronizing signal synchronously generate the training mode of each one digit number number of it is believed that, and output circuit sends to data sink with each position of training mode and parallel data.
In data sink, synchronous signal generating circuit uses reference signal to generate the receiver synchronizing signal, and pattern detection circuit detects this training mode.Clock is adjusted circuit and is adjusted the phase place of first clock signal by using each one digit number number of it is believed that, to the clock signal of each generation through adjusting of parallel data, so that guaranteed settling time and retention time for each one digit number number of it is believed that.The data buffer circuit is written into each one digit number number of it is believed that according to the clock signal through adjusting, and keeps the data bit of predetermined quantity in time continuously, and when detecting training mode the memory location of initialization data buffer circuits.Read circuit and select to be stored in chronological order long numeric data in the data buffer circuit, and read selected data as parallel data according to the second clock signal and with receiver signal Synchronization ground.
Description of drawings
Figure 1A is the block diagram of the traditional source method for synchronous of expression;
Figure 1B is illustrated in a plurality of gating points in the method for synchronous of source;
Fig. 1 C represents long shake;
Fig. 1 D represents the variation of clock frequency;
Fig. 2 A represents the principle structure according to data transmitter of the present invention and data sink;
How Fig. 2 B represents allocation base calibration signal S1, S2.
Fig. 3 represents the structure of synchronous signal generating circuit;
Fig. 4 is the sequential chart of synchronous signal generating circuit;
Fig. 5 is illustrated in the synchronous transmission between a plurality of chips;
Fig. 6 represents the synchronized relation between a plurality of chips;
Fig. 7 represents the structure of anti-time lag (deskew) function between a plurality of chips;
Fig. 8 represents the structure of mode generator;
Fig. 9 represents to use the chip chamber transmission of frequency multiplication;
Figure 10 is to use the sequential chart of the chip chamber transmission of frequency multiplication;
Figure 11 represents to be used for the structure of parity check;
Figure 12 has represented to add the transmission data of parity check bit;
How Figure 13 represents the tranmitting data register signal;
Figure 14 is the schematic diagram of output circuit;
Figure 15 is the schematic diagram that speed (rate) is selected signal generating circuit;
Figure 16 is the half point schematic diagram of (frequency halfdividing) circuit frequently;
Figure 17 is set to sequential chart under the situation of fast transmission mode doubly in transmission mode;
Figure 18 is set to sequential chart under the situation of constant speed transmission mode in transmission mode;
Figure 19 is the schematic diagram of input circuit;
It is tuning that Figure 20 represents how to carry out;
Figure 21 is the flow chart of the tuning processing procedure of expression;
Figure 22 represents the first tuning processing;
Figure 23 represents the second tuning processing;
Figure 24 represents calibration (calibration) sequential; And
Figure 25 represents the structure that is used to test.
Embodiment
With reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
Fig. 2 A represents the principle structure according to data transmitter of the present invention and data sink.
In a first aspect of the present invention, data transmitter 101 comprises synchronous signal generating circuit 111, pattern generating circuit 112 and output circuit 113, and the multi-bit parallel data are sent to data sink 102.Data sink 102 comprises synchronous signal generating circuit 121, pattern detection circuit 122, clock adjustment circuit 123, data buffer circuit 124 and reads circuit 125, and receives the parallel data that sends from data transmitter 101.
In data transmitter 101, synchronous signal generating circuit 111 uses reference signal to produce the transmitter synchronizing signal, pattern generating circuit 112 and transmitter synchronizing signal synchronously generate the training mode that is used for respectively each data-signal (can be referred to as " the one digit number number of it is believed that ") that the data by single position constitute, and output circuit 113 sends to data sink 102 with training mode and parallel data step-by-step.
In data sink 102, synchronous signal generating circuit 121 uses reference signal to generate the receiver synchronizing signal, and pattern detection circuit 122 detects training mode.Clock is adjusted circuit 123 and by using each one digit number number of it is believed that the phase place of first clock signal is adjusted, generate each the clock signal that is used for parallel data, thereby guaranteed settling time and retention time for each one digit number number of it is believed that through adjusting.Data buffer circuit 124 is written into each one digit number number of it is believed that according to the clock signal through adjusting, and keeps the data bit of predetermined quantity in time continuously, and when detecting training mode the memory location of initialization data buffer circuits 124.Read circuit 125 and synchronously select to be stored in chronological order long numeric data in the data buffer circuit 124, and read selected data as parallel data according to the second clock signal and with the receiver synchronizing signal.
According to data transmitter 101 and data sink 102, the a plurality of synchronizing signals that generate according to transmitting terminal and the shared reference signal of receiving terminal have been used, and synchronously generate training mode with in these synchronizing signals one, to guarantee the logical synchronization between data transmitter 101 and the data sink 102.Therefore, in the phase change that has suppressed between the number of it is believed that of a plurality of one digit number, and do not need to carry out high-speed transfer under the situation of wiring of the equal length between transmitter 101 and the receiver 102.In addition, adjust clock signal, guaranteed the settling time and the retention time of each one digit number number of it is believed that by using these one digit number numbers of it is believed that.
In a second aspect of the present invention, the data sink 102 of first aspect also comprises write circuit 126.Data buffer circuit 124 comprises the buffer of predetermined quantity, is used for keeping in chronological order the data bit of predetermined quantity.Write circuit 126 maintains the pointer information that writes of the buffer next time wanting stored data bit of expression in a plurality of buffers, and the one digit number number of it is believed that is imported by writing the buffer that signal-arm is represented.When detecting training mode, pattern detection circuit 122 initialization write pointer information.
According to data sink 102, use the initialization timing that comes the writing position in the specified data buffer circuits 124 with the synchronous training mode that generates of transmitter synchronizing signal.Thus, guaranteed transmitter synchronizing signal and write logical synchronization between the timing of data buffer circuit 124.
In a third aspect of the present invention, the data buffer circuit 124 of the data sink 102 of first aspect comprises the buffer of predetermined quantity, is used for keeping according to time sequencing the data bit of predetermined quantity.Read circuit 125 maintain expression in a plurality of buffers next time will be from the reading pointer information of a buffer of its read data bit, and come initialization reading pointer information according to the receiver synchronizing signal.
According to data sink 102, come the initialization timing of reading the position in the specified data buffer circuits 124 by the receiver synchronizing signal.Therefore, guaranteed the receiver synchronizing signal and the timing of reading from data buffer circuit 124 between logical synchronization.
For example, data transmitter 101 and data sink 102 are corresponding with shown in Fig. 2 B and among the chip 211-221 that describes after a while each, and respectively with shown in Fig. 7 and transmitter chip 701 and the receiver chip 702 described after a while corresponding.Synchronous signal generating circuit 111,121 is for example corresponding with among the synchronous signal generating circuit 231-241 shown in Fig. 2 B each.
Therefore, guaranteed the logical synchronization between data transmitter and the data sink, and do not need the wiring of the equal length between data transmitter and the data sink, and make in the phase change between a plurality of one digit number number of it is believed that reduces parallel data, can carry out high-speed transfer.In addition, the settling time and the retention time of each one digit number number of it is believed that in data sink, have been guaranteed to be used for.
Key property according to the transmitter chip of present embodiment and receiver chip is as follows:
(1) in receiver chip, according to the change point generation optimal sample point (that is optimal clock rising edge) of the one digit number number of it is believed that.Reference signal is distributed to all chips, carrying out data transmission/reception, and be created on every n produces a H (height) level in the cycle synchronizing signal according to this reference signal.The training mode that use generates according to synchronizing signal is guaranteed the logical synchronization between transmitter chip and the receiver chip, to realize synchronous transmission.Thus, make that the wiring of equal length is inessential for the time lag of eliminating between the number of it is believed that of a plurality of one digit number.
(2) clock signal in the transmitter chip is sent to receiver chip, this receiver chip is adjusted the clock signal that is received.Therefore, eliminated the influence of long shake to the relation between the PLL of the PLL of transmitter chip and receiver chip.
(3) parity check bit of training mode in adding this training mode to that uses when carrying out the tuning of chip chamber transmission or training or carry out transfer of data between a plurality of chips sent, and receiver chip has the mechanism that is used for this parity check bit of verification.In this way, can correctly transmit training mode, and can not detected mistakenly.
(4) output at transmitter chip is provided with multiplexer, is provided for clock signal is carried out simultaneously the function of frequency division in receiver chip.This makes it possible to transmit with the speed of the doubled frequency of the internal clock signal of chip.For adopting the doubly part of speed transmission, the wiring quantity between the chip can be reduced by half, make it possible to reduce the number of terminals of chip.Therefore, owing to solved the problem of terminal deficiency, and increased the function that can in chip, realize, thus realized multifunction chip, and saved cost.
(5) when the phase place of only carrying out the clock signal in the receiver chip in the tuner operation process is adjusted, because supply voltage and variation of temperature, and make after tuner operation stops, regularly may change.Therefore, not only in the tuner operation process, and in the actual mechanical process of synchronous transmission system, the clock phase adjustment function in the receiver chip is remained valid.In this way, can follow the tracks of the timing that causes owing to the supply voltage in the system operation process and variations in temperature changes.
(6) in the chip chamber transmission, if each chip in the system of being included in is carried out tuning startup setting respectively, it is long and too complicated that then a series of initial setting up may become.Therefore, a chip in each system is defined as " father " chip, and other each chip belongs to this father's chip and comprises sequencer, and this sequencer carries out tuning to the interface between father's chip and this sequencer itself when starting this father's chip.Solved the long and complicated problems too of initial setting up sequence thus.
(7) realized that in each chip the training mode that is used to detect produces circuit.The clock that the output that training mode is produced circuit is used as receiver chip is adjusted the test signal of circuit.In this way, when chip chamber transmission is analyzed, can irrespectively carry out the test that is used to confirm that sending function and receiving function can normal runnings with other element to each chip.
Fig. 2 B represents to be used for the method to each chip allocation base calibration signal.System shown in Fig. 2 B comprises plate 201-207.On plate 201-204, be separately installed with chip 211-214, and on plate 206 and 207, be separately installed with chip 220 and 221.Chip 215-219 is installed on plate 205.Chip 211-221 has synchronous signal generating circuit 231-241 respectively.Two kinds of reference signals (being reference signal S1 and S2) are distributed to each synchronous signal generating circuit of these chips.
Fig. 3 represents the structure of each synchronous signal generating circuit, and Fig. 4 is the sequential chart of the signal in the synchronous signal generating circuit shown in Fig. 3.The synchronous signal generating circuit of Fig. 3 comprises PLL301, shift register 302,304,306, AND circuit 303,305 and FF circuit 307.Shift register 302,304 and 306 is made of l level, m level and n level FF circuit respectively.
Reference signal S1 is used as the reference clock signal of PLL 301, is the signal of the twice of reference signal S1 and reference signal S2 is a frequency.As reference clock signal, PLL 301 generates clock signal C lock (VCO) and step size signal (pace signal) with reference signal S1.This step size signal has identical frequency with this reference clock signal.
In order to detect the differential of step size signal, shift register 302 uses clock signal C lock (VCO) with the step size signal l level that is shifted, and AND circuit 303 will be during the displacement of step size signal the FF circuit output and export as signal X1 in the logical produc of the output of displacement FF circuit in latter stage.Shift register 306 uses clock signal C lock (VCO), will so that reference signal S2 is synchronous, and will be output as signal X3 through the reference signal S2 of displacement as the reference signal S2 displacement n level of asynchronous signal.
Shift register 304 uses clock signal C lock (VCO) with signal X1 displacement m level, so that be the center with " H " (height) level cycle of signal X3 the pulse of signal X1 is shifted, and the signal X1 that will carry out displacement thus is output as signal X2.The logic product of AND circuit 305 output signal X2 and X3 is as signal X4.FF circuit 307 latchs signal X4 according to clock signal C lock (VCO), then it is output as the shared synchronizing signal of these chips.
Maintain the timing of reference signal S1 and S2 with the synchronous synchronizing signal of the clock signal C lock (VCO) that when generating synchronizing signal, uses, and rise to " H " level once in every n the cycle of clock signal C lock (VCO).In the example of Fig. 4, n is 16.
By reference Fig. 5 and Fig. 6 the transmission between a plurality of chips is described.The purpose that reaches is the synchronized relation of realizing between a plurality of chips, that is, from a plurality of chips to single chip and the synchronized relation the transmission from single chip to a plurality of chips, and realize carrying out the chip chamber transmission with the frequency multiplication of these chips.
Fig. 5 represent to be used for from a plurality of transmitter chip A ..., A ' is to the structure of receiver chip B with the dual-rate of these chips transmission data.Transmitter chip A have output circuit 501-i (i=1,2 ...., p), and transmitter chip A ' have output circuit 502-i (i=1,2 ..., p).Receiver chip B has input circuit 503-i, 504-i, circular buffer 505-i, 506-i (i=1,2 ..., p) and reading pointer circuit 507.
Among output circuit 501-i and the 502-i each is exported to two parallel data by time division multiplexing one signal line of the correspondence in the many signal line that constitute transmission path.Input circuit 503-i and 504-i will give a plurality of circular buffers of the correspondence among circular buffer 505-i and the 506-i from the data input transfer of each signal line respectively.
Among circular buffer 505-i and the 506-i each is all by a plurality of buffers or multistagely constitute, and keeps the quantity data position of these grades in time continuously.As mentioned above, the progression of circular buffer is consistent with the periodicity n that wherein produces once the frequency of the synchronizing signal of " H " level.
The value of the data bit that each circular buffer will newly receive is written into (it is specified by the value that writes pointer (WP)) in its a plurality of buffers or a plurality of level.Other buffer keeps being stored in wherein each value.Write the buffer that the value representation of pointer will regularly write at next clock, and periodic variation is the analog value of all grades of circular buffer.
Reading pointer circuit 507 will represent that respectively circular buffer 505-i and 506-i's will regularly remain reading pointer (RP) from each buffer of its sense data position or the value of each grade at next clock.By synchronizing signal each reading pointer is initialized as trigger, and similar to the situation that writes pointer, the value of each reading pointer is periodically changed into all buffers of corresponding circular buffer or the analog value of all grades.Read from this buffer or this level with writing irrespectively,, and all read these data once with the buffer in each circular buffer 505-i and 506-i, selecting to represent or the data in the level by reading pointer.Read the two bits in the adjacent two-stage that is stored in each circular buffer simultaneously.
Can think, when the circular buffer 505-i from receiver chip B read in special time from transmitter chip A send and lead to data A1, A2 that transmission path receives by receiver chip B ..., Am, An, simultaneously from the circular buffer 506-i of receiver chip B read data A ' 1, A ' 2 from transmitter chip A ' transmission ..., when A ' m, A ' n, chip A ..., realized synchronously between A ' and the chip B.
Fig. 6 has schematically shown the data mode before having set up synchronously between the chip.Figure " output of the input circuit " expression in Fig. 6 left side is as the result's who among input circuit 503-i, the 504-i phase place of clock signal is adjusted state, and the phase place of each one digit number number of it is believed that is asynchronous.Figure " circular buffer: write " expression in the middle of Fig. 6 will write the circular buffer 505-i of chip B and the state of 506-i from the data of chip A and A ' respectively.At this moment, it is synchronous also not set up chip chamber.
The figure on Fig. 6 right side " circular buffer: read " trigger that is provided by synchronizing signal is provided regularly reads the data that write circular buffer 505-i and 506-i respectively, and sets up the synchronous state of chip chamber thus.
Fig. 7 represents to use the structure of the anti-time lag of chip chamber of circular buffer.Transmitter chip 701 has mode generator 711, selects circuit 712,713 and output circuit 714, and receiver chip 702 has input circuit 721, mode detector 722, writes pointer circuit 723, circular buffer 724 and reading pointer circuit 725.The assembly of transmitter chip 701 and receiver chip 702 is corresponding with the part of all components of each chip shown in Fig. 2 B, and in fact each in all chips all comprises the assembly of transmitter chip and receiver chip.
The mode generator 711 of transmitter chip 701 is by generating training mode with the synchronizing signal shown in Fig. 3 and Fig. 4 as triggering signal (trigger).In the selection circuit 712,713 each is selected the output signal of routine data signal or mode generator 711 according to the data switching signal, and exports selected signal.Output circuit 714 has the function of the actuating force that is used to improve the data that send.
The input circuit 721 of receiver chip 702 has the phase place that is used for clock signal to be adjusted, and the function of the clock signal of output through adjusting and the data-signal that is received.Mode detector 722 detects training mode from the data signal sequence that is received, and output is used for the reset signal that initialization writes pointer.Write pointer circuit 723 and reading pointer circuit 725 and keep above-mentioned pointer and the reading pointer of writing respectively.Circular buffer 724 will store into from the data-signal of input circuit 721 outputs by buffer that writes the pointer appointment or the level, and from buffer or level dateout by the reading pointer appointment.
By the following operation of transmitter chip 701 and receiver chip 702, eliminated the time lag between the data-signal, and it is synchronous to have set up chip chamber:
(1) synchronizing signal according to transmitter chip 701 generates training mode.
(2) in receiver chip 702, mode detector 722 is being undertaken detecting training mode after the phase place adjustment by input circuit 721, to determine by the reset signal pointer that writes that writes pointer circuit 723 being carried out initialized timing.After detecting training mode, the shielding reset signal.
(3) synchronizing signal by receiver chip 702 is identified for reading pointer is carried out initialized timing.
(4) according to writing pointer and reading pointer is carried out writing/reading of circular buffer 724.The initial value that writes pointer and reading pointer is according to setting and different.
In transmitter chip 701, in the phase place adjustment process of being undertaken, perhaps in the time lag adjustment process, select circuit 712,713 outputs to offer output circuit 714 with mode generator 711 by input circuit 721.By synchronizing signal is generated the training mode of using as triggering signal in time lag is adjusted, and this training mode can be the repeat pattern with predetermined period.
Fig. 8 is the structure of the mode generator shown in Fig. 7.Mode generator 711 shown in Fig. 8 comprises counter 801, decoder 802, selects circuit 803, OR circuit 804 and FF circuit 805.When synchronizing signal was " L " (low) level, counter 801 carried out its counting operation with the output counter value, and when rising to " H " level in synchronizing signal with the Counter Value zero clearing.
802 pairs of Counter Values from counter 801 of decoder are decoded, and output is used for the training mode (that is phase place adjustment modes) of phase place adjustment and is used for another training mode (that is time lag adjustment modes) that time lag is adjusted.Select circuit 803 to select phase place adjustment modes or time lag adjustment modes, and export selected pattern according to mode select signal.OR circuit 804 output from the output of selecting circuit 803 and termination pattern select signal logic and, and FF circuit 805 latchs the output of OR circuit 804, so that it is output as output mode.
Fig. 9 represents to be used for carrying out with the frequency multiplication of these chips the structure of chip chamber transmission, and Figure 10 is the sequential chart according to the chip chamber transmission of this structure.
The output circuit 714 of the transmitter chip 701 shown in Fig. 7 comprises multiplexer 901 and FF circuit 902, and through-rate be this chip clock signal twice clock signal (promptly, internal clock signal) two the adjacent one digit number numbers of it is believed that in this chip is carried out multiplexed, and will be outputed to transmission path through multiplexed signal.Below the clock signal of dual-rate can be called " frequency doubling clock signal ".The phase place of the clock signal of the twice of the internal clock signal that 721 pairs of frequencies of the input circuit of receiver chip 702 are receiver chip 702 is adjusted, and the frequency doubling clock signal of output through adjusting.In this way, from moment of output circuit 714 output and write between moment of circular buffer 724 and transmit a plurality of data bit with dual-rate.
Reading pointer circuit 725 upgrades reading pointer according to internal clock signal, and from by reading two data bit simultaneously two buffers of the circular buffer 724 of reading pointer appointment or the two-stage.In this way, realized that the chip chamber that carries out with the frequency multiplication of these chips transmits.
In the present embodiment, the frequency doubling clock signal is corresponding with the clock signal C lock (VCO) among Fig. 3, and for example carries out frequency division by the frequency doubling clock signal to chip, generates internal clock signal.
Figure 11 represents to send training mode by adding parity check bit to training mode, to carry out the structure of parity check.In this embodiment, parity check bit produces circuit and is included in the output circuit 714 of transmitter chip 701, and parity check testing circuit 1101 is included in the receiver chip 702.
As shown in figure 12, in tuning process, the parity check bit of transmitter chip 701 generation circuit adds the parity check bit of single position in the serial data of predetermined figure to.Parity check testing circuit 1101 detection parities from the data signal sequence that is received of receiver chip 702 is to carry out parity check.Thus, can line-by-line ground determine integrality by the data bit of each signal line transmission.
Figure 13 represents to be used for clock signal is sent to from transmitter chip 701 structure of receiver chip 702.In this embodiment, transmitter chip 701 has clock driver special circuit 1302, and receiver chip 702 has clock receiver special circuit 1312.Clock driver special circuit 1302 will send to receiver chip 702 as the source clock signal from the frequency doubling clock signal of PLL 1301 outputs, and clock receiver special circuit 1312 sends the source clock signal that is received to input circuit 721.
-phase change that causes owing to the voltage after the just opening power and variations in temperature is reduced.
-reduced the influence of the long-time shake of PLL.
Figure 14 represents the structure of output circuit 714, and this structure comprises rate selection signal generating circuit 1401, half point frequency circuit 1402, selection circuit 1403, OR circuit 1404,1410, FF circuit 1405,1406,1414,1415,1416, AND circuit 1407,1408,1409, same or circuit 1411, XOR circuit 1412, NAND circuit 1413 and buffer 1417,1418 and 1419.
In these elements, rate selection signal generating circuit 1401, half point frequency circuit 1402, selection circuit 1403, OR circuit 1404,1410, FF circuit 1405,1406 and 1407,1408,1409 cooperations of AND circuit are to switch transmission mode according to the mode initialization signal.That is, when the mode initialization signal is " H " level, selects the constant speed transmission mode, and when the mode initialization signal is " L " level, select doubly fast transmission mode.
When having set up the constant speed transmission mode,, carry out the transfer of data of carrying out with half frequency of frequency doubling clock signal by single output circuit 714 and the single input circuit 721 that each one digit number number of it is believed that is provided.With single position is that unit is from circular buffer 724 reading of data.
As shown in figure 15, rate selection signal generating circuit 1401 comprises FF circuit 1501,1503, AND circuit 1502 and inverter 1504, and generates the rate selection signal according to synchronizing signal and frequency doubling clock signal.As shown in figure 16, half point frequency circuit 1402 comprises AND circuit 1601, FF circuit 1602, inverter 1603, and generates half equifrequency (equal frequency) clock signal that frequency is the frequency doubling clock signal by the frequency doubling clock signal being carried out frequency division.
When the mode initialization signal is " H " level, selects the clock signal that circuit 1403 is selected and output is exported from half point frequency circuit 1402, and when the mode initialization signal is " L " level, select and output frequency doubling clock signal.To be input to each clock terminal of FF circuit 1405,1406,1414,1415,1416 from the clock signal of selecting circuit 1403 outputs.
OR circuit 1404 with the output of rate selection signal generating circuit 1401 and select circuit 1403 output logic and export to FF circuit 1405,1406 as the input data latch control signal.AND circuit 1407 is exported to AND circuit 1408,1409 with the logic NOT of mode initialization signal and the logic product of rate selection signal generating circuit 1401 as path select signal.
With or circuit 1411, XOR circuit 1412, NAND circuit 1413, FF circuit 1414,1415,1416 and buffer 1417,1418,1419 cooperate, be used to strengthen the peaking operation at the edge of outputting data signals with execution.
Figure 17 and 18 is respectively the sequential chart of having set up under the situation of doubly fast transmission mode and constant speed transmission mode.
Under fast transmission mode doubly, will be used as the input data latch control signal from the rate selection signal of rate selection signal generating circuit 1401 outputs, and be used as path select signal, and not need to handle.Under this pattern, the FF circuit 1501 in the rate selection signal generating circuit 1401 is the synchronizing signal one-period that is shifted, and with trailing edge through the synchronizing signal of displacement be " L " level (1701) synchronously with the zero clearing of rate selection signal, as shown in figure 17.After this, this rate selection signal inversion is perhaps switched (toggle) with the frequency of frequency doubling clock signal to this rate selection signal.Before input first synchronizing signal, the state of rate selection signal (that is, " H " or " L ") is unknown (1702).
The trailing edge of FF circuit 1405,1406 and input data latch control signal synchronously latchs (1703-1706) data-signal from the sub-A of data input pin, B respectively.The trailing edge of path selecting circuit and path select signal is synchronously selected (1707) data-signal from FF circuit 1405, and synchronously selects data-signal from FF circuit 1406 with the rising edge of path select signal.
On the other hand, under the constant speed transmission mode, do not adopt, be fixed as " H " level, simultaneously path select signal is fixed as " L " level but will import data latch control signal from the rate selection signal of rate selection signal generating circuit 1401 outputs.Under this pattern, the clock signal zero clearing that synchronously will export from half point frequency circuit 1402 with the trailing edge of synchronizing signal be " L " level (1801), and make this clock signal anti-phase, perhaps this clock signal is switched, as shown in figure 18 with the frequency of frequency doubling clock signal.
Figure 19 represents the structure of input circuit 721, its have select circuit 1901, frequency dividing circuit 1902, phase-adjusting circuit 1903, on/following counter 1904, gating signal generation circuit 1905, phase detectors 1906, frequency dividing circuit 1907, chopper circuit 1908 and latch cicuit 1909.Input circuit 721 detects the level (" H " or " L ") of input clock signal at the change point place of data-signal, and the phase place of clock signal is adjusted, so that can receive data in the suitable timing of guaranteeing settling time and retention time.
The change point of gating signal generation circuit 1905 data detection signals.Phase detectors 1906 receive the clock signal through adjusting at the change point place of data-signal, with the level of detection clock signal, and output is specified/counting direction of following counter 1904 or the control signal of direction of displacement.
Frequency dividing circuit 1907 generates according to the change point of data-signal/the shift clock signal of following counter 1904.By signal DIV[1:0] set the frequency dividing ratio of frequency dividing circuit 1907.On/following counter 1904 is according to the shift clock signal that comes self frequency-dividing circuit 1907, carries out its counting operation with the counting direction by phase detectors 1906 appointments.
When clock selection signal CLKSEL is " H " level, select circuit 1901 to be chosen as the adjustment object from the source clock signal that transmitter chip 701 receives, and when signal CLKSEL is " L " level, will be chosen as the adjustment object from the frequency doubling clock signal of PLL 1311 outputs.When the mode initialization signal is " H " level (, when having set up the constant speed transmission mode), 1902 pairs of half point frequency circuits carry out frequency division from the clock signals of selecting circuit 1901, be equifrequency clock signal from half of the clock signal of selection circuit 1901 with generated frequency.On the other hand, when the mode initialization signal is " L " level (, when having set up doubly fast transmission mode), 1902 outputs of half point frequency circuit are from the clock signal of selecting circuit 1901, and this clock signal are not handled.
Phase-adjusting circuit 1903 is with reference to the state of last/following counter 1904, and ahead of time or postpone from the phase place of the clock signal of half point frequency circuit 1902 outputs.To export from input circuit 721 as clock signal by the clock signal that phase-adjusting circuit 1903 has carried out adjusting, and be input to chopper circuit 1908 through adjusting.Latch cicuit 1909 latchs and outputting data signals according to the clock signal from chopper circuit 1908.In the present embodiment, the combination with chopper circuit 1908 and latch cicuit 1909 is used to suppress cell delay (cell delay).Yet, also can adopt FF circuit rather than this combination.
Figure 20 represents to use training mode to carry out tuning structure.Figure 21 is the flow chart of expression according to the tuning processing of this structure.Transmitter chip 701 among Figure 20 and receiver chip 702 have register 2001,2002 respectively.
Carry out with two-stage (being phase place adjustment and time lag adjustment) tuning, and according to the adjustment type of being paid close attention to distinguishing for adjusting the training mode that sends.711 pairs of the mode generators of the transmitter chip 701 by the output phase adjustment modes are tuning to carry out initialization, and output circuit 714 sends to receiver chip 702 (step 2101) with this pattern.For example, before tuning, send " a 11 ' 0 ' ", and in the phase place adjustment process, send the repeat pattern (this repeat pattern is the phase place adjustment modes) of " 11101000 ".The input circuit 721 of receiver chip 702 is adjusted (step 2102) according to the data-signal of the phase place adjustment modes that is received to the phase place of clock signal.
After sending the phase place adjustment modes, behind process predetermined amount of time Δ T1 (step 2103), will switch to time lag adjustment modes (step 2104) from the phase place adjustment modes by the pattern that mode generator 711 generates.For example, send " 10011101 " as the time lag adjustment modes.Mode detector 722 in the receiver chip 702 when detecting the time lag adjustment modes, the initialization circular buffer write pointer (step 2105).
After sending the time lag adjustment modes, behind process predetermined amount of time Δ T2 (step 2106), mode generator 711 output termination patterns, and the notice that will be sent completely writes register 2001 (step 2107).At this moment, the termination pattern shown in Fig. 8 selects the level of signal to become " H ", and sends termination pattern " a 11 ' 1 ' ".When sending termination pattern, transmitter chip 701 will send data and switch to routine data.The mode detector 722 (step 2108) when detecting termination pattern of receiver chip 702 writes register 2002 (step 2109) with the notice that finishes receiving.
Execution and the system of the handling process of Figure 21 are constituted or interface irrelevant, and can after the transmission of the time lag adjustment modes of step 2104, proceed the phase place adjustment.Write the transmission of register 2001,2002/finish receiving notice by removing, make can carry out once more tuning.
In receiver chip 702, when detecting termination pattern, can send to input circuit 721 and end the instruction that phase place is adjusted.When sending this instruction, the tuning selection signal that will be used to be provided with fixed cycle operator is input to mode detector 722.
According to tuning selection signal sets under the situation of the pattern that only excute phase is adjusted in tuning process, mode detector 722 will be ended the instruction of phase place adjustment and export to input circuit 721 when detecting termination pattern, to stop the phase place adjustment, as shown in figure 22.
According to tuning selection signal sets carry out all the time under the situation of another pattern that phase place adjusts, mode detector 722 is exported to input circuit 721 with the instruction of excute phase adjustment all the time, even so that when detecting termination pattern, do not stop the phase place adjustment yet, when receiving routine data, proceed the phase place adjustment as shown in figure 23, and thus.
Figure 24 is illustrated in the order of the tuning or calibration institute foundation between a plurality of chips of system shown in the execution graph 2B, and its chips 215 is father's chips.When indication chip 215 starts, according to the process transmission training mode of Figure 21.Each chip determines whether to finish transmission/reception automatically, and carries out the processing of next step.In the present embodiment, carry out tuning with the order of (1)-(4).
Figure 25 represents to be used to test the structure of the input circuit 721 of receiver chip 702, and this receiver chip 702 comprises: p input circuit 721-i is used to receive p parallel-by-bit data; P mode detector 722-i (i=1,2 ..., p); And mode generator 2501, be used to generate the training mode (perhaps " test pattern ") that is used to test.The output of mode generator 2501 links to each other with the input terminal that is used for each input circuit 721-i tests.
Input circuit 721-i use test pattern rather than come the excute phase adjustment from the phase place adjustment modes that transmitter chip 701 sends, and according to the data signal sequence of exporting test pattern through the clock signal of adjusting.Mode detector 722-i detects test pattern from the data signal sequence of being exported, test with the phase position adjusting function to input circuit 721-i.By turn test result is judged.When detecting test pattern, output " determining ".When after detecting once, not detecting test pattern, perhaps when not detecting test pattern, export " NG " at all.
Claims (18)
1, a kind of data transmitter is used for the multi-bit parallel data are sent to receiver, and this data transmitter comprises:
Synchronous signal generating circuit, it uses reference signal to generate the transmitter synchronizing signal;
Pattern generating circuit, itself and described transmitter synchronizing signal synchronously generate each the training mode that is used for described parallel data; And
Output circuit, it sends to described receiver bit by bit with described training mode and described parallel data, wherein use described reference signal to generate the receiver synchronizing signal, after detecting described training mode, the memory location of initialization data buffer circuits, in a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by parallel data each is adjusted the phase place of first clock signal, generate each the clock signal that is used for described parallel data through adjusting, so that guarantee settling time and retention time for each one digit number number of it is believed that, according to clock signal each one digit number number of it is believed that is written into described data buffer circuit through adjusting, the data of continuous in time predetermined figure are kept in the data buffer circuit, and synchronously select to be stored in long numeric data in the described data buffer circuit in chronological order according to the second clock signal and with described receiver synchronizing signal, and read this long numeric data as parallel data.
2, data transmitter according to claim 1,
Wherein said output circuit comprises the selection circuit, and it selects the frequency equifrequency clock signal identical with described second clock signal, and perhaps frequency is the frequency doubling clock signal of the twice of described second clock signal,
And when having selected the equifrequency clock signal, use selected equifrequency clock signal to send described parallel data, and when having selected the frequency doubling clock signal, use selected frequency doubling clock signal, send described parallel data by time division multiplexing with two positions.
3, data transmitter according to claim 1, wherein said pattern generating circuit is exported described training mode by described training mode being divided into phase place adjustment modes, time lag adjustment modes and termination pattern.
4, a kind of data sink is used to receive the multi-bit parallel data that send from transmitter, and this data sink comprises:
Synchronous signal generating circuit, it uses reference signal to generate the receiver synchronizing signal;
Pattern detection circuit, it detects the training mode with transmitter synchronizing signal synchronized transmission, and this transmitter synchronizing signal is to use described reference signal to be produced by described transmitter;
Clock is adjusted circuit, in its a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by described parallel data each is adjusted the phase place of first clock signal, generate each the clock signal that is used for described parallel data, so that guarantee settling time and retention time for each one digit number number of it is believed that through adjusting;
The data buffer circuit, it is written into each one digit number number of it is believed that according to described clock signal through adjusting, and is kept at the data of predetermined figure continuous in time, and when detecting described training mode, its memory location of initialization; And
Read circuit, it synchronously selects to be stored in chronological order long numeric data in the described data buffer circuit according to the second clock signal and with described receiver synchronizing signal, and reads selected data as parallel data.
5, data sink according to claim 4 also comprises write circuit, and
Wherein said data buffer circuit comprises and the buffer of the data bit similar number of described predetermined quantity, is used for preserving in chronological order described a plurality of data bit,
Wherein said write circuit is preserved and is write pointer information, this writes pointer information and represents a buffer wanting stored data bit next time in described a plurality of buffer, and the said write circuit is input to the number of it is believed that of next one digit number in the described buffer of being represented by the said write pointer information
And described pattern detection circuit is initialization said write pointer information when detecting training mode.
6, data sink according to claim 4,
Wherein said data buffer circuit comprises and the buffer of the data bit equal number of described predetermined quantity, is used for preserving in chronological order described a plurality of data bit,
And the described circuit that reads is preserved reading pointer information, in the described a plurality of buffers of described reading pointer information representation next time will be from a buffer of its read data bit, and the described circuit that reads is according to the described reading pointer information of described receiver synchronizing signal initialization.
7, data sink according to claim 4, wherein said data buffer circuit comprises n buffer, be used for preserving in chronological order the data bit of predetermined quantity, and each the every n cycle in described transmitter synchronizing signal and the described receiver synchronizing signal rises to high level once.
8, data sink according to claim 4 also comprises:
Clock generating circuit, it generates clock signal; And
Select circuit, it selects described clock signal that is generated by described clock generating circuit or the source clock signal that sends from described transmitter, as described first clock signal.
9, data sink according to claim 4, also comprise the parity check testing circuit, it detects this parity check bit in the data signal sequence that parity check bit is added to training mode the time from the data signal sequence that is received, to carry out parity check.
10, data sink according to claim 4, wherein said clock is adjusted circuit and is comprised frequency dividing circuit, it sends parallel data in the frequency of utilization clock signal identical with described second clock signal, and when the frequency of described first clock signal is the twice of described second clock signal, by described first clock signal is carried out frequency division, generate frequency and be half clock signal of described first clock signal, and this frequency dividing circuit is when sending described parallel data by time division multiplexing with two, by frequency of utilization is that the clock signal of the twice of described second clock signal is exported described first clock signal, and described first clock signal is not handled, described clock is adjusted the phase place of circuit adjustment from the clock signal of this frequency dividing circuit output.
11, data sink according to claim 4, wherein when being provided with first pattern of only in the tuner operation process, carrying out described phase place adjustment, in detected training mode is under the situation of termination pattern, described pattern detection circuit will be indicated the signal of ending described phase place adjustment to export to described clock and be adjusted circuit, and when being provided with when continuing to carry out second pattern that described phase place adjusts, even detected training mode is a termination pattern, described pattern detection circuit is also proceeded indication the signal of phase place adjustment and is exported to described clock adjustment circuit.
12, data sink according to claim 4, also comprise pattern generating circuit, the training mode that its generation is used to test, and wherein, when described clock adjustment circuit uses the described training mode that is used to test to adjust the phase place of described first clock signal, described pattern detection circuit detects the described training mode that is used to test from the data signal sequence that sends according to described clock signal through adjusting, adjust the phase position adjusting function of circuit to test described clock.
13, a kind of system that comprises a plurality of data transmitter-receivers, these a plurality of data transmitter-receivers send/receive the multi-bit parallel data mutually, and each in these a plurality of data transmitter-receivers comprises:
Synchronous signal generating circuit, its reference signal of distributing to described a plurality of data sink-transmitters by use generates synchronizing signal;
Pattern generating circuit, itself and described synchronizing signal synchronously generate each the training mode that is used for described parallel data;
Output circuit, it sends to other data transmitter-receiver as receiving terminal bit by bit with described training mode and described parallel data;
Pattern detection circuit, it detects the training mode that sends with a synchronous signal Synchronization, and this synchronizing signal is to use the described reference signal in one of described a plurality of data transmitter-receivers as transmitting terminal to generate;
Clock is adjusted circuit, in its a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by described parallel data each is adjusted the phase place of first clock signal, with to the clock signal of each generation, so that guaranteed settling time and retention time for described each one digit number number of it is believed that through adjusting from the described parallel data that sends as the data transmitter of transmitting terminal-receiver;
The data buffer circuit, it is written into each one digit number number of it is believed that according to described clock signal through adjusting, and be kept at the data bit of predetermined quantity continuous in time, and when detecting described training mode the memory location of this data buffer circuit of initialization; And
Read circuit, it synchronously selects to be stored in chronological order long numeric data in the described data buffer circuit according to the second clock signal and with the synchronizing signal that is generated by described synchronous signal generating circuit, and reads selected data as parallel data.
14, a kind of system that comprises a plurality of data transmitter-receivers, these a plurality of data transmitter-receivers send/receive the multi-bit parallel data mutually, and each in these a plurality of data transmitter-receivers comprises:
Synchronous signal generating circuit, the reference signal that described a plurality of data sink-transmitters are distributed in its use generates synchronizing signal;
Pattern generating circuit, itself and described synchronizing signal synchronously generate each the training mode that is used for described parallel data; And
Output circuit, it sends to other data transmitter-receiver as receiving terminal bit by bit with described training mode and described parallel data;
Pattern detection circuit, it detects the training mode that sends with a synchronous signal Synchronization ground, and this synchronizing signal is to use the described reference signal in one of described a plurality of data transmitter-receivers as transmitting terminal to generate;
Clock is adjusted circuit, in its a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by described parallel data each is adjusted the phase place of first clock signal, with to the clock signal of each generation, so that guaranteed settling time and retention time for each one digit number number of it is believed that through adjusting from the described parallel data that sends as the data transmitter of transmitting terminal-receiver;
The data buffer circuit, it is written into each one digit number number of it is believed that according to described clock signal through adjusting, and the holding time is gone up the data bit of continuous predetermined quantity; And
Read circuit, it selects to be stored in chronological order long numeric data in the described data buffer circuit according to the second clock signal, and reads selected data as parallel data,
Wherein said a plurality of transmitter-receiver uses the synchronous transmission of carrying out described parallel data by the synchronizing signal of described synchronous signal generating circuit generation and described training mode.
15, system according to claim 14, wherein when when starting tuning instruction and send to data transmitter-receiver in described a plurality of data transmitter-receiver, by a described data transmitter-receiver is used as starting point, between described a plurality of data transmitter-receivers, carries out successively and use the tuning of described training mode.
16, a kind of data transmission method is used for the multi-bit parallel data are sent to receiver from transmitter, and this method comprises:
On described transmitter part, use reference signal to generate the transmitter synchronizing signal;
Synchronously generate each the training mode that is used for described parallel data with described synchronizing signal; And
Described training mode and described parallel data are sent to described receiver bit by bit, and
On described receiver part, use described reference signal to generate the receiver synchronizing signal;
When detecting described training mode, the memory location of initialization data buffer circuits;
In a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by described parallel data each is adjusted the phase place of first clock signal, generate each the clock signal that is used for described parallel data, so that guaranteed settling time and retention time for each one digit number number of it is believed that through adjusting;
According to described clock signal through adjusting each one digit number number of it is believed that is written into described data buffer circuit, the data bit of continuous predetermined quantity is kept in the described data buffer circuit to incite somebody to action in time; And
Selection is stored in the long numeric data in the described data buffer circuit in chronological order according to the second clock signal, and reads selected data as parallel data.
17, a kind of data transmitter is used for the multi-bit parallel data are sent to receiver, and this data transmitter comprises:
Synchronous signal generating circuit, it uses reference signal to generate the transmitter synchronizing signal;
Pattern generating circuit, itself and described synchronizing signal synchronously generate each the training mode that is used for described parallel data; And
Output circuit, it sends to described receiver bit by bit with described training mode and described parallel data, in described receiver, use described reference signal to generate the receiver synchronizing signal, the memory location of initialization data buffer circuits when detecting described training mode, the phase place of first clock signal is adjusted by single a plurality of one digit number number of it is believed that constitutes of described parallel data by using respectively, generate each the clock signal that is used for described parallel data through adjusting, so that guaranteed settling time and retention time for each one digit number number of it is believed that, according to described clock signal each one digit number number of it is believed that is written into described data buffer circuit through adjusting, with will be in time the data bit of continuous predetermined quantity be kept in the described data buffer circuit, and select to be stored in long numeric data in the described data buffer circuit in chronological order according to the second clock signal.
18, a kind of data sink is used to receive the multi-bit parallel data that send from transmitter, and this data sink comprises:
Synchronous signal generating circuit, it uses reference signal to generate the receiver synchronizing signal;
Pattern detection circuit, it detects the training mode of the transmitter synchronizing signal synchronized transmission that generates with the reference signal of using in the described transmitter;
Clock is adjusted circuit, in its a plurality of one digit number number of it is believed that constitutes by the single position of using respectively by described parallel data each is adjusted the phase place of first clock signal, generate each the clock signal that is used for described parallel data, so that guaranteed settling time and retention time for each one digit number number of it is believed that through adjusting;
The data buffer circuit, it is written into each one digit number number of it is believed that according to described clock signal through adjusting, and be kept at the data bit of predetermined quantity continuous in time, and when detecting described training mode the memory location of this data buffer circuit of initialization; And
Read circuit, it synchronously selects to be stored in chronological order long numeric data in the described data buffer circuit according to the second clock signal and with described receiver synchronizing signal, and reads selected data as parallel data.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004225976A JP4456432B2 (en) | 2004-08-02 | 2004-08-02 | Apparatus and method for performing synchronous transmission using reference signal |
| JP2004225976 | 2004-08-02 |
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| Publication Number | Publication Date |
|---|---|
| CN1735005A true CN1735005A (en) | 2006-02-15 |
| CN100518051C CN100518051C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100022482A Expired - Fee Related CN100518051C (en) | 2004-08-02 | 2005-01-18 | Device and method for synchronous parallel data transmission using reference signal |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7460630B2 (en) |
| EP (1) | EP1624635B1 (en) |
| JP (1) | JP4456432B2 (en) |
| KR (1) | KR100648057B1 (en) |
| CN (1) | CN100518051C (en) |
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| KR101412071B1 (en) * | 2007-10-30 | 2014-06-26 | 삼성전자주식회사 | Method for controlling ISI and semiconductor memory device for using the same |
| CN101884035A (en) * | 2007-12-05 | 2010-11-10 | Nxp股份有限公司 | Source-synchronous data link for system-on-chip design |
| KR101401587B1 (en) * | 2008-01-29 | 2014-06-02 | 삼성전자주식회사 | Apparatus and method for sending brosdcast channel in communication system |
| US8427457B2 (en) * | 2008-02-22 | 2013-04-23 | Himax Technologies Limited | Display driver and built-in-phase-calibration circuit thereof |
| JP5056524B2 (en) | 2008-03-25 | 2012-10-24 | 富士通株式会社 | Data transmission system, data transmission method, data transmission device, and data reception device |
| KR100942950B1 (en) | 2008-09-02 | 2010-02-22 | 주식회사 하이닉스반도체 | Semiconductor memory device |
| JP5374514B2 (en) | 2008-11-05 | 2013-12-25 | ザインエレクトロニクス株式会社 | Transmitting apparatus, receiving apparatus, and communication system |
| EP2375621A4 (en) | 2008-12-11 | 2012-05-02 | Fujitsu Ltd | Reception device, transmission device, and transmission method |
| JP5263386B2 (en) | 2009-03-04 | 2013-08-14 | 富士通株式会社 | Data transfer device, data transmission device, data reception device, and control method |
| US20100325372A1 (en) * | 2009-06-17 | 2010-12-23 | Housty Oswin E | Parallel training of dynamic random access memory channel controllers |
| US8284882B2 (en) * | 2009-06-25 | 2012-10-09 | Lsi Corporation | Methods and apparatus for qualification of update of clock recovery and equalization |
| US9923711B2 (en) * | 2010-04-30 | 2018-03-20 | Rambus Inc. | Low power edge and data sampling |
| EP2658162A1 (en) * | 2010-12-21 | 2013-10-30 | Fujitsu Limited | Data reception circuit, information processing device, data reception program and data reception method |
| US8520428B2 (en) * | 2011-03-25 | 2013-08-27 | Intel Corporation | Combined data level-shifter and DE-skewer |
| EP2959629A4 (en) | 2013-02-21 | 2016-10-05 | Qualcomm Inc | Method and apparatus for data aided timing recovery in 10gbase-t system |
| JP5786976B2 (en) * | 2013-06-11 | 2015-09-30 | オンキヨー株式会社 | Signal modulation circuit |
| US9479310B2 (en) * | 2013-08-06 | 2016-10-25 | Infineon Technologies Ag | Method, apparatus and system to communicate with a device |
| US9379878B1 (en) * | 2013-12-27 | 2016-06-28 | Clariphy Communications, Inc. | Deskew in a high speed link |
| JP6277031B2 (en) * | 2014-03-26 | 2018-02-07 | 株式会社メガチップス | Data receiver |
| EP3107218B1 (en) * | 2015-06-19 | 2023-06-14 | Gwf Ag | Method and device for transmitting data and counter unit |
| JP6373512B2 (en) * | 2015-11-09 | 2018-08-15 | 三菱電機株式会社 | Air conditioner control device |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2733569B2 (en) | 1992-02-14 | 1998-03-30 | シャープ株式会社 | Serial synchronous communication system |
| JPH05336210A (en) | 1992-05-29 | 1993-12-17 | Toshiba Corp | Communication function confirming system |
| JPH05336091A (en) | 1992-06-03 | 1993-12-17 | Nec Corp | Bus communication system |
| JPH06177940A (en) | 1992-12-08 | 1994-06-24 | Mitsubishi Electric Corp | Uart and system using thereof |
| US5832047A (en) * | 1994-06-17 | 1998-11-03 | International Business Machines Corporation | Self timed interface |
| JP3468592B2 (en) | 1994-08-10 | 2003-11-17 | 富士通株式会社 | Clock signal generation circuit |
| JP3146117B2 (en) | 1994-10-03 | 2001-03-12 | 株式会社日立製作所 | Automatic clock timing adjustment method and automatic clock timing adjustment device |
| JPH10164037A (en) | 1996-12-02 | 1998-06-19 | Nec Corp | Inter-data-bit skewness adjustment circuit |
| JPH11163846A (en) | 1997-12-01 | 1999-06-18 | Hioki Ee Corp | Data receiver and data transmission system |
| JP2000134189A (en) | 1998-10-28 | 2000-05-12 | Nec Corp | Clock extract circuit and clock extract method |
| JP2000285144A (en) | 1999-03-29 | 2000-10-13 | Agency Of Ind Science & Technol | Digital circuit and clock signal control method therefor |
| US6658581B1 (en) * | 1999-03-29 | 2003-12-02 | Agency Of Industrial Science & Technology | Timing adjustment of clock signals in a digital circuit |
| JP3409739B2 (en) | 1999-05-25 | 2003-05-26 | 日本電気株式会社 | Automatic skew adjuster |
| US6611217B2 (en) * | 1999-06-11 | 2003-08-26 | International Business Machines Corporation | Initialization system for recovering bits and group of bits from a communications channel |
| US6680636B1 (en) * | 2000-03-31 | 2004-01-20 | Silicon Graphics, Inc. | Method and system for clock cycle measurement and delay offset |
| JP3758953B2 (en) | 2000-07-21 | 2006-03-22 | 富士通株式会社 | Skew correction device |
| US7054331B1 (en) * | 2000-09-13 | 2006-05-30 | Intel Corporation | Multi-lane receiver de-skewing |
| JP2002108642A (en) | 2000-09-27 | 2002-04-12 | Matsushita Electric Ind Co Ltd | Semiconductor integrated circuit and its testing method |
| US6704890B1 (en) * | 2000-12-22 | 2004-03-09 | Nortel Networks Limited | Skew compensating interface for operation with arbitrary data |
| JP2002223208A (en) | 2001-01-29 | 2002-08-09 | Nec Corp | Method and system for multi-channel data transmission |
| JP2003273852A (en) | 2002-03-14 | 2003-09-26 | Shinji Kimura | Semiconductor integrated circuit device |
-
2004
- 2004-08-02 JP JP2004225976A patent/JP4456432B2/en not_active Expired - Fee Related
- 2004-12-13 EP EP04257726.2A patent/EP1624635B1/en not_active Ceased
-
2005
- 2005-01-04 KR KR1020050000395A patent/KR100648057B1/en active IP Right Grant
- 2005-01-18 CN CNB2005100022482A patent/CN100518051C/en not_active Expired - Fee Related
- 2005-02-15 US US11/057,146 patent/US7460630B2/en not_active Expired - Fee Related
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| CN101868948B (en) * | 2009-01-30 | 2012-10-10 | 哉英电子股份有限公司 | Clock control circuit and transmitter |
| CN104424378A (en) * | 2013-09-11 | 2015-03-18 | 富士通半导体股份有限公司 | Method for determining phase of clock used for reception of parallel data, receiving circuit, and electronic apparatus |
| CN104424378B (en) * | 2013-09-11 | 2017-11-07 | 株式会社索思未来 | Parallel data receives phase determination method, receiving circuit and the electronic installation of clock |
| CN107122325A (en) * | 2017-04-27 | 2017-09-01 | 成都理工大学 | Data transmission system and method based on novel universal universal serial bus |
| CN107122325B (en) * | 2017-04-27 | 2020-01-03 | 成都理工大学 | Data transmission system and method based on universal serial bus |
| CN111106922A (en) * | 2018-10-26 | 2020-05-05 | 美格纳半导体有限公司 | Receiving apparatus and operating method thereof |
| CN111106922B (en) * | 2018-10-26 | 2024-05-31 | 美格纳智芯混合信号有限公司 | Receiving apparatus and method of operating the same |
| CN112802440A (en) * | 2019-10-28 | 2021-05-14 | 海信视像科技股份有限公司 | Display device and sound low-delay processing method |
| CN112802440B (en) * | 2019-10-28 | 2022-10-28 | 海信视像科技股份有限公司 | Display device and sound low-delay processing method |
| CN111124978A (en) * | 2019-10-30 | 2020-05-08 | 苏州浪潮智能科技有限公司 | Method and device for correcting phase of parallel bus |
| US11789488B2 (en) | 2019-10-30 | 2023-10-17 | Inspur Suzhou Intelligent Technology Co., Ltd. | Parallel bus phase correction method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060012241A (en) | 2006-02-07 |
| EP1624635A2 (en) | 2006-02-08 |
| US7460630B2 (en) | 2008-12-02 |
| JP2006050102A (en) | 2006-02-16 |
| KR100648057B1 (en) | 2006-11-23 |
| CN100518051C (en) | 2009-07-22 |
| EP1624635A3 (en) | 2012-07-11 |
| US20060023825A1 (en) | 2006-02-02 |
| EP1624635B1 (en) | 2014-09-24 |
| JP4456432B2 (en) | 2010-04-28 |
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